Sprinkler base



FIG. 1 is a perspective view of a sprinkler base showing our new design;

FIG. 2 is a front elevational view showing the design for the sprinkler base of FIG. 1;

FIG. 3 is a rear elevational view showing the design for the sprinkler base of FIG. 1;

FIG. 4 is a left side elevational view showing the design for the sprinkler base of FIG. 1;

FIG. 5 is a right side elevational view showing the design for the sprinkler base of FIG. 1;

FIG. 6 is a top plan view showing the design for the sprinkler base of FIG. 1; and,

FIG. 7 is a bottom plan view showing the design for the sprinkler base of FIG. 1.

The broken line showing of portions of the sprinkler base in FIGS. 1-7 is included for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a sprinkler base, as shown and described. 